Thumbstick attachment interface



FIG. 1 is a bottom front isometric view of a thumbstick attachment interface showing our new design;

FIG. 2 is a top front isometric view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side thereof;

FIG. 8 is a right side view thereof; and,

FIG. 9 is an enlarged view of the enclosed portion labeled as “FIG. 9” in FIG. 1.

The evenly-dashed broken lines showing the interior of the thumbstick attachment interface depict portions that form no part of the claimed design. The long-short dashed lines illustrate the designated magnified portion, in FIGS. 1 and 9, that form no part of the claimed design. The remaining broken lines showing of a game controller illustrate environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a thumbstick attachment interface, as shown and described. 